Internal-combustion engine



1. vmmsom.

lNTERNAL COMBUSTION ENGINE.

APPHCATION mu) APR.5,1917.

Patente Ear 15, 19215.6

3 SHEETSSHEET lwavros nrroniairs J. WILKINSON.

INTERNAL CUMBUSHON ENGINE.

APPHCATION FILED APR.5,1917.

l,3?1,405 Patented Mar. 15, 1921.

3 SHEETSSHEET 2- INVENFOR ATTORNEYS J. WILKINSON.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED APR. 5, 19'17.

g g y gg 2mm Mar. 15 1921.

3 SHEETS-SHEET 3.

JSHN VJ'ILKINSQN. OF SYRILCUSE, NEW YURI i. ASSIGNOR TO H. H. FRANKLIN MANU- FACTURING} CGMFEDTY, DIE SYRACUSE. NEW YORK, A CORPORATION 0'5 NEV YORK.

INTERNAL-COMBUSTEON ENGINE.

Application To all whom it may concern:

3e it known that 1 dons: d'inainson, a citizen of the United States. and a resident or" Syracuse in the county of Unondaga and State or New York, have invented a certain new and useful lnternal-Combustion Engine, of which thefollowing is a specifi" cation.

invention relates to air cooled internal combustion engines and has for its object a particularly simple and eflicient construction whereby the heat radiating or cooling surface is increased and whereby the cylinders can be cast in block and also formed of a lighter material, as aluminum, than is now userh and the invention consists in the novel teatures and in the combinations and constructions hereinafter set forth and claimed.

in describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a vertical cross sectional view through the cylinder and the crank casing of my engine, the piston, crank shaft and other moving parts being removed.

Fig. 2 is a "frag i-nentary side elevation thereof, moving parts being omitted.

Fig. 3 is a plan view of parts seen in 2, one of the cylinders being Shown in transverse section.

This internal combustion engine comprises. generally a cylinder having; an integral base port on or extension at the lower end of its cylindrical wall and cooling flanges on the cylinder wall and the base portion.

in this embodiment of my invention. the crank case is divided transversely into upper and lower sections and the upper section is the base portion termed integral with the cylinder Wall.

1 designates the cylinder wall; 2, the base pet tion formed integral with the cylinder wall at the lower end thereof and constituting the upper section of the transversely divided crank casing".

3 is the lower section of the crank casing, which is secured to the section 2 in any suitable manner as by cap screws 4: extending through horizontal flanges 5. 6 pr, vided respectively on the upper and iower sectiops oi the crank casing.

The line of division of the crank casing Specification of Letters Eatcnt.

Patented Mar. 15, 1921.

"led April 5, 1917. Serial No. 159,973.

extends transversely through the crank shaft bearing; 7, dividing said bearing.

The upper section 2 which is integral with the cylinder wall 1 is also formed with cam shaft bearin s 8. 9 are vertical cooling flanges provided on the lateral sides of the cylinders, and 10 are vertical flanges provided on the base portion 2, the flanges 10 forming continuations of some of the flanges 9.

Some of the flanges on the right hand portion of the engine base 2, that is. the portion on which the cam shaft and the valve rods are located, are omitted.

When the engine is multi-cylinder, a plurality of cylinders and the base portions 2 thereof are cast in block. as seen in Figs. 2 and 3, and the cylinders are spaced apart on the base portion 2. and flanges or webs 12 connect the cylinders near the points where they are closest together.' As here shown, the cylinders are connected by two webs or flanges 12, these webs or flanges being provided with openings 13 at their lower ends for permitting the passage of air from the space between them.

The cylinders. the upper portion of the base and the webs connecting the cylinders are all cast in one piece, making a light rigid construction, so that a light metal can be used in the construction of the engine.

14 designates the head of each cylinder which is secured thereto in any suitable manner as by cap screws 15. this head being provided with suitable inlet and exhaust passages 16, 17 and with external laterally extending heat radiating flanges 18 which are usually arranged in vertical alinement *ith the flanges 9 of the cylinder.

In use, the cylinders 1 are inclosed in casingzs formed in halves, the halves being located on opposite sides of the engine so that each cylinder is practically inclosed in a cylindrical casing or chimney. and the halves of the casing are secured to the flanges 12 by fastening members extending into the openings 19 in said flanges. The air is moved downwardly through the casings over the cylinders and the'base 2, usually, by means of a flywheel fan at the rear of. the engine or a blower in front.

Giving to the section 2 forming an integral extension of the cylinder walls, the heat is conducted or distributed over a larger area than when the cylinders are separably mounted upon a base, as it is well known that in engine construction, heat does not effectively conduct from one part to another which are joined together, and are not integral. Further, as before pointed out, a partlcularly rigid construction is provided which permits the use of a lighter construction than has heretofore been used in air cooled engine constructlon.

The arrangement of the casing of the cylinders and the air cooling system of the cylinders constitute the subject matter of another application.

lVhat I claim is:

1. An internal combustion engine having I its cylinder provided with integral base extensions at the lower end of its cylindrical wall and on opposite sides of the engine, the

cylindrical Wall and the extensions being formed with heat radiating flanges, substantially as and for the purpose described.

2. In an air cooled multi-cylinder internal combustion engine, the combination of a plucase integral, and cooling flanges on the cylinder and said part of the crank case, substantially as and for the purpose specified.

4. An internal combustion engine havingits cylinder and contiguous ortion of the crank case integral, cooling ganges extending lengthwise of the cylinder, and cooling flanges on said crank case forming continuations of the flanges on the cylinder, substantially as and for the purpose set forth.

' 5. An air cooled internal combustion engine having its crank case divided transversely into upper and lower sections, a

I cylinder integral with the upper section, and

cooling flanges provided on the cylinder wall "and the upper part of the crank case, substantially as and for the purpose specified.

6. An internal combustion engine having its base divided transverselyinto upper and lower sections, a cylinder integrahwith the upper section, and vertical cooling flanges on the cylinder wall and the upper part of the base, substantially as and for the purpose set forth.

7. An internal combustion engine having its base divided transversely through the crank shaft bearings into upper and lower sections, means for securing the sections togetheryand a cylinder formed integral with the upper section, the cylinder having a removable head, the cylinder wall and the upper section of the crank case integral there: with, being provided with vertical cooling flanges, substantially as and for the purpose specified.

8. An air cooled multi-cylinder internal combustion engine having its cylinders cast in block and spaced apart throughout the height of the cylinders and provided. with.

integral external flanges connecting the cylinders and extending across the space be tween the cylinders, the flanges extending vertically lengthwise of the cylinders, the cylinders also having peripheral heat radiating flanges around the same, substantially as and for the purpose specified.

9. An air cooled multi-cylinder internal combustion engine having anupper portion in its crank case and the cylinders cast in block, the cylinders being spaced apart on the crank case and having integral flanges extending lengthwise thereof and connecting the same at the points said cylinders are nearest together, the cylinders also having heat radiating flanges around the same, sub stantially as and for the purpose set forth.

10. A multi-cylinder internal combustion engine having the upper portion of its crank case and the cylinders cast in block, the cylinders being spaced apart on the upper portion of the crank case, integral flanges connecting the cylinders at. the points they are nearest together, the cylinders and 'the upper ortion of the crank case also having vertical extending flanges on their sides, substantially as and for the purpose described.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and State of New York, this 29th day of March, 1917 JOHN WILKINSON. 

